Just so you know 1st.....I was also a drinker who isolated at home every night.
my alcohol fed my depression which fed my alcohol consumption to feel better which led to feeling worse. I also had insomnia made worse by meds and drinking....and for the icing on the cake...menopause!!!
i went from a "heavy" drinker to 8-10 BIG glasses of wine every night...(about 1.5 liters) topped off with shots of vodka.
i did not taper, i drank what was in the house and stopped while i was home sick...i had withdrawal but it was tolerable. you should have your doctor on speed-dial.